This will convert your input to postfix notation using the Shunting Yard algorithm then evaluate it using a stack machine. It supports +, -, *, /, ^, parentheses, and sin, cos, tan, asin, acos, atan, abs, sqrt, and log. The math functions have the highest precedence, so "sin 2 * 2" is the same as "sin(2) * 2". Type in your problem and press enter. When you're ready to enter another problem press space.
Negative numbers must not have a space between the sign and the number or it will give you weird results. (5 - -5) not (5 - - 5).
